Code No. U0100 Engine CAN timeout
Code No. U0101 T/M CAN timeout
Code No. U0114 4WD CAN timeout


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • If diagnosis codes U0100, U0101 and U0114 are set in ASC-ECU, always diagnose the CAN bus line. If there is any fault in the CAN bus lines, an incorrect diagnosis code may be set. In this case, the set diagnosis code is not highly reliable.
  • Before replacing the ECU, ensure that the communication circuit is normal.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if ASC-ECU cannot receive the signal sent from other ECU for a certain period.

OPERATION
ASC-ECU communicates with the engine-ECU, CVT-ECU, A/T-ECU, 4WD-ECU, AWC-ECU, via the CAN bus lines.

PROBABLE CAUSES
Code No. U0100
  • Wiring harness or connector failure of CAN bus line
  • Engine-ECU malfunction
  • ASC-ECU malfunction
Code No. U0101
  • Wiring harness or connector failure of CAN bus line
  • CVT-ECU malfunction <4B1>
  • A/T-ECU malfunction <4N1, 6B3>
  • ASC-ECU malfunction
Code No. U0114
  • Wiring harness or connector failure of CAN bus line
  • 4WD-ECU malfunction <Vehicles without S-AWC>
  • AWC-ECU malfunction <Vehicles with S-AWC>
  • ASC-ECU malfunction

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis
Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ). On completion, go to Step 4.

STEP 2. Check whether the diagnosis code is set again.

Q. Is Code No. U0100, U0101 or U0114 set?
Go to Step 3.
The procedure is complete.

STEP 3. M.U.T.-III other system diagnosis code
Use M.U.T.-III to check that other diagnosis code is set in the ECU corresponding to the relevant diagnosis.

Q. Is other diagnosis code set?
Troubleshoot for the relevant diagnosis code.
Go to Step 4.

STEP 4. M.U.T.-III diagnosis code
Use M.U.T.-III to check if the same diagnosis code (time-out) is set in the other ECU.

Q. Is any diagnosis code set?
YES (Code No. U0100 is set) : Replace the engine-ECU (Refer to GROUP 13A - Engine-ECU <4B1>, GROUP 13B - Engine-ECU <6B3> or GROUP 13D - Engine-ECU <4N1>), and then go to Step 5.
YES (Code No. U0101 is set) : Replace the CVT-ECU (Refer to GROUP 23A - CVT-ECU) <4B1> or A/T-ECU (Refer to GROUP 23C - A/T-ECU) <4N1, 6B3>, and then go to Step 5.
YES (Code No. U0114 is set) : Replace 4WD-ECU (Refer to GROUP 27C - 4WD-ECU) <Vehicles without S-AWC> or AWC-ECU (Refer to GROUP 23C - AWC-ECU ) <Vehicles with S-AWC>, and then go to Step 5.

STEP 5. Check whether the diagnosis code is set again.
Erase the diagnosis code.

Q. Is Code No. U0100, U0101 or U0114 set?
Replace the hydraulic unit (integrated with ASC-ECU).
The procedure is complete.